Fokko commented on code in PR #6128:
URL: https://github.com/apache/iceberg/pull/6128#discussion_r1018100513
##########
python/pyiceberg/transforms.py:
##########
@@ -249,6 +294,20 @@ def satisfies_order_of(self, other: Transform) -> bool:
def result_type(self, source: IcebergType) -> IcebergType:
return IntegerType()
+ def project(self, name: str, pred: BoundPredicate) ->
Optional[UnboundPredicate]:
Review Comment:
Nice, thanks! That was one of the areas I was unsure of. Since we can
simplify this quite a lot on the Python side, it was a bit tricky to translate.
I also added tests:
```python
def test_projection_day_human(bound_reference_date: BoundReference) -> None:
date_literal = literal(date(2018, 1, 1))
assert DayTransform().project("dt",
BoundEqualTo(term=bound_reference_date, literal=date_literal)) == EqualTo(
term="dt", literal=literal(17532)
) # == 2018, 1, 1
assert DayTransform().project("dt",
BoundLessThanOrEqual(term=bound_reference_date, literal=date_literal)) ==
LessThanOrEqual(
term="dt", literal=literal(17532)
) # <= 2018, 1, 1
assert DayTransform().project("dt",
BoundLessThan(term=bound_reference_date, literal=date_literal)) ==
LessThanOrEqual(
term="dt", literal=literal(17531)
) # <= 2017, 12, 31
assert DayTransform().project(
"dt", BoundGreaterThanOrEqual(term=bound_reference_date,
literal=date_literal)
) == GreaterThanOrEqual(
term="dt", literal=literal(17532)
) # >= 2018, 1, 1
assert DayTransform().project("dt",
BoundGreaterThan(term=bound_reference_date, literal=date_literal)) ==
GreaterThanOrEqual(
term="dt", literal=literal(17533)
) # >= 2018, 1, 2
```
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